Manufacture of metal unions.



G. GHISHOLM. MANUFACTURE OF METAL UNIONS.

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I fill/I) J APPLICATION FILED NOV. 30, 1900. RENEWED JAN. 24, 1903.

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PATBNTED JUNE 2, 1903.

U G. UHISHULM. MANUFACTURE OF METALUNIONS. APPLICATION FILED NO V. 30, 1900- REFEWED JAN. 24, 1903.

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UNITED STATES Patented June 2, 963. PATENT OFFICE.

-GEORGE OHISHOLM, OF BIRMINGHAM, ENGLAND.

MANUFACTURE OF METAL unions.

SPECIFIGATIDN forming part of Letters Patent No. 730,093, dated June 2, 1903.

Application filed November 30, 190p. Renewed January 24, 1903. Serial No. 140,445. (110 model.)

To aZZ whom it may concern:

Be it known that I, GEORGE CHISHQLM, brass-founder, a subject of the King of Great Britain, and a resident at 630 Coventry road, Birmingham, in the county of Warwick, England, have invented new and useful Improvements in and Relating to the Manufacture of Metal Unions, (for which I have applied for a patent in Great Britain, No. 19,327, dated October 29, 1900,) of which the following is a specification.

My invention has for its object improvements in and relating'to the manufacture of metal unions which I form complete from sheet metal by stamping, cutting, and press j ing the same into the required shape, thus? reducingthe cost of manufacture and pro-l ducing a superior article which is free from i the sand-holes so often found in cast-unions In order that my inventionfmay be clearly understood and more easily carried into practice, I have appended hereunto two sheets of drawings upon which 'I have fully illustrated the nature of my said improvements together with the mode of carrying the same into of) feet.

Figure 1 is a plan of the sheet-metal blank from whichthe connecting parts of the union are formed. Fig. 2'is an elevation of Fig. 1. Fig. 3 is a section after the first process of cupping has been effected. Fig. 4 is a similar section to Fig. 3 after the second process of cupping. Fig. 5'is also a similar section to .Fig. 3, but after the third process of cupping. Fig. 6 is a section'after the lastcupping process has been effected and the end has been pierced. Fig. 7 is a section of the tube,illustrating the enlarged screw-head on the female part of the union. Fig. Sis an enlargement of Figs. 6 and 7, showing in detail the mode of manufacturing the head. Fig. 9 is asimilar section to Fig. 7, but showing the screw formed on the head. Fig. 10 is an elevation of Fig. 9. Fig. 11 is a section similar to Fig. 6 and from which the male part of the union is also formed. Fig. 12 isa section illustrating the formation of the male part. Fig. 13 is an end elevation of Fig. 12. Fig. 14 is a section of a tube suitable for forming the screw-collar connection. Fig. 15 is a section illustrating the formation of the screwcollar. Fig. 16 is an elevation of Fig. 15. Fig. similar to that shown by Fig. 17.

17 is a similar elevation to Fig. 16, but showing a modified exterior. Fig. 18. is a section through the union complete. Fig. 19 is an elevation of Fig. 18. Fig. 20. is a diagramsection illustrating the tools for making the female part. Fig. 21 is a similar section to Fig. 20, showing the tools for completing the female part; and Fig. 22 is a similar view showing the tools for making the male part.

I will first proceed to describe the manufacture of the female portion of the union, in carrying which into elfect the circular blank A is cut out of sheet-brass or other suitable the flange e is pressed over into the form shown by Figs. 7 and 8, the head 9 at the same time being enlarged in diameter, while the diameter of the tube part f is reduced, thereby forming the.shoulder j, against the inside of which the edge is of the flange e is pressed. It will thus be seen that the flange e thickens out and strengthens the head j where enlarged and allows the said head to be screwed, as shown, without being weakened.

'The male part B of the union is formed from a pierced clip, as shown by Fig. 11,

which has been man ufacturedin the manner described-with regard to the pierced cup from which the female portion is formed, being a then placed in suitable tools by which the thickened flange h is pressed-into the inclined form shown by Fig. 12, while at the same time the collar Z is pressed outall around the'tube.

as the projection 12 is formed. To complete the screw-collar, the interior is tapped to fit the head of the female part A, and the pro jection n is milled or the exterior of the col- ICO lar may be pressed into the shape of a nut The ends 65. metal and by means of a press and tools is 7' and s of both tubes may be tapped to re ceive metal pipes or left plain in the case of those used for flexible pipes.

Referring to the tools fox-pressing the parts of the union into the required shape, Fig. 20 shows a pair suitable for reducing the part] of the connection A and which consists of the top tool X, bottom tool Y, and ring Z, the bottom tool having a rounded and reduced neck 15, through which the partf of the tube A is forced, the pressure of the top tool X at the same time further inverting the flange e. The tube A is then placed in the bottom die Y, Fig. 21, the top tool X having a shoulder V for forcing the metal into the enlargement to for the head. In the male connection B the flange h having been pressed over inward is placed in the (lie Y, Fig. 22, the depression of the tool X squeezing the metal outward into the recess to form the collar 1.

Having now described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. The process of manufacture of metal unions which consists of pressing a circular blank into a substantially cup-shaped body having a circular opening in its bottom, thus forming a tube having at one end an annular flange, then pressing the. flange over upon the end of the body which is expanded to form an enlarged head, the diameter of the tube part at the same time being correspondingly reduced to form a shoulder at the juncture of the tube and head parts against the inside of which the top flange is pressed, substantially as specified.

2. The process of manufacture of metal unions which consists of pressing a circular metallic blank into a substantially cupshaped body having a circular opening in its bottom thus forming a tube having at one end an annular flange, then pressing the thickened flange into an inclined head and at the same time pressing an external collar on the tube at the juncture of the head and tube parts, substantially as specified.

3. The process of manufacture of metal unions which consists of pressing a circular blank into a substantially cup-shaped body havinga circular opening in its bottom, thus forming a tube having at one end an annular flange, then pressing the flange over upon the end of the body which is expanded to form an enlarged head, the diameter of the tube part at the same time being correspondingly reduced to form a shoulder at the juncture of the tube and head parts againstthe inside of which the top flange is pressed, and then screw-threading the external surface of the head, substantially as specified.

4. The process of manufacture of metal unions which consists of pressing a circular metallic blank into a substantially cupshaped body having a circular opening in its bottom, thus forming a tube having at one end an annular flange, to form a projecting rim, and at the same time forming on the other face of the tube part a semicircular head then tapping the internal faces and milling the external surfaces, substantially as specified.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

GEORGE CI'IISI'IOLM.

Witnesses:

Lnwls W. Goom), WALTER II. E. BARTLAM. 

